span.headerbtn.glyphicon:hover {
    cursor: pointer;
}

span.headerbtn.glyphicon {
    font-size: 60%;
    position: relative;
    margin-left: -25px;
    padding-right: 5px;
    color: rgb(161, 161, 161);
    -webkit-transition: opacity 1s;
    transition: opacity 1s;
    opacity: 0;
}

h1:hover span.headerbtn,h2:hover span.headerbtn, h3:hover span.headerbtn{
    opacity: 1;
    visibility: visible;
}